4. Costs and Estimated Earnings on Uncompleted Contracts: Schdule of Status of Projects in progress (Details)	May 31, 2024 USD ($)	May 31, 2023 USD ($)
Details
Number of Projects in progress	19	22
Aggregate percent complete	53.00%	33.00%
Aggregate amount remaining	$ 17,405,603	$ 18,061,484
Percentage of total value invoiced to customer	56.00%	29.00%